2 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the Open Source and Linux Lab nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #define TARGET_LONG_BITS 32
33 #define ELF_MACHINE EM_XTENSA
35 #define CPUArchState struct CPUXtensaState
38 #include "qemu-common.h"
39 #include "exec/cpu-defs.h"
40 #include "fpu/softfloat.h"
42 #define NB_MMU_MODES 4
44 #define TARGET_PHYS_ADDR_SPACE_BITS 32
45 #define TARGET_VIRT_ADDR_SPACE_BITS 32
46 #define TARGET_PAGE_BITS 12
49 /* Additional instructions */
50 XTENSA_OPTION_CODE_DENSITY,
52 XTENSA_OPTION_EXTENDED_L32R,
53 XTENSA_OPTION_16_BIT_IMUL,
54 XTENSA_OPTION_32_BIT_IMUL,
55 XTENSA_OPTION_32_BIT_IMUL_HIGH,
56 XTENSA_OPTION_32_BIT_IDIV,
58 XTENSA_OPTION_MISC_OP_NSA,
59 XTENSA_OPTION_MISC_OP_MINMAX,
60 XTENSA_OPTION_MISC_OP_SEXT,
61 XTENSA_OPTION_MISC_OP_CLAMPS,
62 XTENSA_OPTION_COPROCESSOR,
63 XTENSA_OPTION_BOOLEAN,
64 XTENSA_OPTION_FP_COPROCESSOR,
65 XTENSA_OPTION_MP_SYNCHRO,
66 XTENSA_OPTION_CONDITIONAL_STORE,
67 XTENSA_OPTION_ATOMCTL,
69 /* Interrupts and exceptions */
70 XTENSA_OPTION_EXCEPTION,
71 XTENSA_OPTION_RELOCATABLE_VECTOR,
72 XTENSA_OPTION_UNALIGNED_EXCEPTION,
73 XTENSA_OPTION_INTERRUPT,
74 XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
75 XTENSA_OPTION_TIMER_INTERRUPT,
79 XTENSA_OPTION_ICACHE_TEST,
80 XTENSA_OPTION_ICACHE_INDEX_LOCK,
82 XTENSA_OPTION_DCACHE_TEST,
83 XTENSA_OPTION_DCACHE_INDEX_LOCK,
89 XTENSA_OPTION_HW_ALIGNMENT,
90 XTENSA_OPTION_MEMORY_ECC_PARITY,
92 /* Memory protection and translation */
93 XTENSA_OPTION_REGION_PROTECTION,
94 XTENSA_OPTION_REGION_TRANSLATION,
96 XTENSA_OPTION_CACHEATTR,
99 XTENSA_OPTION_WINDOWED_REGISTER,
100 XTENSA_OPTION_PROCESSOR_INTERFACE,
101 XTENSA_OPTION_MISC_SR,
102 XTENSA_OPTION_THREAD_POINTER,
103 XTENSA_OPTION_PROCESSOR_ID,
105 XTENSA_OPTION_TRACE_PORT,
160 #define PS_INTLEVEL 0xf
161 #define PS_INTLEVEL_SHIFT 0
167 #define PS_RING_SHIFT 6
170 #define PS_OWB_SHIFT 8
172 #define PS_CALLINC 0x30000
173 #define PS_CALLINC_SHIFT 16
174 #define PS_CALLINC_LEN 2
176 #define PS_WOE 0x40000
178 #define DEBUGCAUSE_IC 0x1
179 #define DEBUGCAUSE_IB 0x2
180 #define DEBUGCAUSE_DB 0x4
181 #define DEBUGCAUSE_BI 0x8
182 #define DEBUGCAUSE_BN 0x10
183 #define DEBUGCAUSE_DI 0x20
184 #define DEBUGCAUSE_DBNUM 0xf00
185 #define DEBUGCAUSE_DBNUM_SHIFT 8
187 #define DBREAKC_SB 0x80000000
188 #define DBREAKC_LB 0x40000000
189 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
190 #define DBREAKC_MASK 0x3f
193 #define MAX_NINTERRUPT 32
196 #define MAX_NCCOMPARE 3
197 #define MAX_TLB_WAY_SIZE 8
198 #define MAX_NDBREAK 2
200 #define REGION_PAGE_MASK 0xe0000000
202 #define PAGE_CACHE_MASK 0x700
203 #define PAGE_CACHE_SHIFT 8
204 #define PAGE_CACHE_INVALID 0x000
205 #define PAGE_CACHE_BYPASS 0x100
206 #define PAGE_CACHE_WT 0x200
207 #define PAGE_CACHE_WB 0x400
208 #define PAGE_CACHE_ISOLATE 0x600
215 /* Dynamic vectors */
216 EXC_WINDOW_OVERFLOW4,
217 EXC_WINDOW_UNDERFLOW4,
218 EXC_WINDOW_OVERFLOW8,
219 EXC_WINDOW_UNDERFLOW8,
220 EXC_WINDOW_OVERFLOW12,
221 EXC_WINDOW_UNDERFLOW12,
231 ILLEGAL_INSTRUCTION_CAUSE = 0,
233 INSTRUCTION_FETCH_ERROR_CAUSE,
234 LOAD_STORE_ERROR_CAUSE,
235 LEVEL1_INTERRUPT_CAUSE,
237 INTEGER_DIVIDE_BY_ZERO_CAUSE,
238 PRIVILEGED_CAUSE = 8,
239 LOAD_STORE_ALIGNMENT_CAUSE,
241 INSTR_PIF_DATA_ERROR_CAUSE = 12,
242 LOAD_STORE_PIF_DATA_ERROR_CAUSE,
243 INSTR_PIF_ADDR_ERROR_CAUSE,
244 LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
247 INST_TLB_MULTI_HIT_CAUSE,
248 INST_FETCH_PRIVILEGE_CAUSE,
249 INST_FETCH_PROHIBITED_CAUSE = 20,
250 LOAD_STORE_TLB_MISS_CAUSE = 24,
251 LOAD_STORE_TLB_MULTI_HIT_CAUSE,
252 LOAD_STORE_PRIVILEGE_CAUSE,
253 LOAD_PROHIBITED_CAUSE = 28,
254 STORE_PROHIBITED_CAUSE,
256 COPROCESSOR0_DISABLED = 32,
271 typedef struct xtensa_tlb_entry {
279 typedef struct xtensa_tlb {
281 const unsigned way_size[10];
283 unsigned nrefillentries;
286 typedef struct XtensaGdbReg {
293 typedef struct XtensaGdbRegmap {
296 /* PC + a + ar + sr + ur */
297 XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
300 typedef struct XtensaConfig {
303 XtensaGdbRegmap gdb_regmap;
308 uint32_t exception_vector[EXC_MAX];
311 uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
312 uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
313 uint32_t inttype_mask[INTTYPE_MAX];
316 interrupt_type inttype;
317 } interrupt[MAX_NINTERRUPT];
319 uint32_t timerint[MAX_NCCOMPARE];
321 unsigned extint[MAX_NINTERRUPT];
323 unsigned debug_level;
327 uint32_t configid[2];
329 uint32_t clock_freq_khz;
335 typedef struct XtensaConfigList {
336 const XtensaConfig *config;
337 struct XtensaConfigList *next;
340 #ifdef HOST_WORDS_BIGENDIAN
352 typedef struct CPUXtensaState {
353 const XtensaConfig *config;
358 uint32_t phys_regs[MAX_NAREG];
363 float_status fp_status;
365 xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
366 xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
367 unsigned autorefill_idx;
369 int pending_irq_level; /* level of last raised IRQ */
371 QEMUTimer *ccompare_timer;
372 uint32_t wake_ccount;
377 /* Watchpoints for DBREAK registers */
378 struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
385 #define cpu_exec cpu_xtensa_exec
386 #define cpu_gen_code cpu_xtensa_gen_code
387 #define cpu_signal_handler cpu_xtensa_signal_handler
388 #define cpu_list xtensa_cpu_list
390 #ifdef TARGET_WORDS_BIGENDIAN
391 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
393 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
396 XtensaCPU *cpu_xtensa_init(const char *cpu_model);
398 #define cpu_init(cpu_model) CPU(cpu_xtensa_init(cpu_model))
400 void xtensa_translate_init(void);
401 void xtensa_breakpoint_handler(CPUState *cs);
402 int cpu_xtensa_exec(CPUState *cpu);
403 void xtensa_finalize_config(XtensaConfig *config);
404 void xtensa_register_core(XtensaConfigList *node);
405 void check_interrupts(CPUXtensaState *s);
406 void xtensa_irq_init(CPUXtensaState *env);
407 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
408 void xtensa_advance_ccount(CPUXtensaState *env, uint32_t d);
409 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
410 void xtensa_rearm_ccompare_timer(CPUXtensaState *env);
411 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
412 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
413 void xtensa_sync_window_from_phys(CPUXtensaState *env);
414 void xtensa_sync_phys_from_window(CPUXtensaState *env);
415 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
416 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
417 uint32_t *vpn, uint32_t wi, uint32_t *ei);
418 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
419 uint32_t *pwi, uint32_t *pei, uint8_t *pring);
420 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
421 xtensa_tlb_entry *entry, bool dtlb,
422 unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
423 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
424 unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
425 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
426 uint32_t vaddr, int is_write, int mmu_idx,
427 uint32_t *paddr, uint32_t *page_size, unsigned *access);
428 void reset_mmu(CPUXtensaState *env);
429 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
430 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
433 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
434 #define XTENSA_OPTION_ALL (~(uint64_t)0)
436 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
439 return (config->options & opt) != 0;
442 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
444 return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
447 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
449 int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
450 if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
451 level = env->config->excm_level;
456 static inline int xtensa_get_ring(const CPUXtensaState *env)
458 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
459 return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
465 static inline int xtensa_get_cring(const CPUXtensaState *env)
467 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
468 (env->sregs[PS] & PS_EXCM) == 0) {
469 return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
475 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
476 bool dtlb, unsigned wi, unsigned ei)
483 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
485 return env->sregs[WINDOW_START] |
486 (env->sregs[WINDOW_START] << env->config->nareg / 4);
489 /* MMU modes definitions */
490 #define MMU_MODE0_SUFFIX _ring0
491 #define MMU_MODE1_SUFFIX _ring1
492 #define MMU_MODE2_SUFFIX _ring2
493 #define MMU_MODE3_SUFFIX _ring3
495 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
497 return xtensa_get_cring(env);
500 #define XTENSA_TBFLAG_RING_MASK 0x3
501 #define XTENSA_TBFLAG_EXCM 0x4
502 #define XTENSA_TBFLAG_LITBASE 0x8
503 #define XTENSA_TBFLAG_DEBUG 0x10
504 #define XTENSA_TBFLAG_ICOUNT 0x20
505 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
506 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
507 #define XTENSA_TBFLAG_EXCEPTION 0x4000
508 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
509 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
511 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
512 target_ulong *cs_base, int *flags)
514 CPUState *cs = CPU(xtensa_env_get_cpu(env));
519 *flags |= xtensa_get_ring(env);
520 if (env->sregs[PS] & PS_EXCM) {
521 *flags |= XTENSA_TBFLAG_EXCM;
523 if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
524 (env->sregs[LITBASE] & 1)) {
525 *flags |= XTENSA_TBFLAG_LITBASE;
527 if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
528 if (xtensa_get_cintlevel(env) < env->config->debug_level) {
529 *flags |= XTENSA_TBFLAG_DEBUG;
531 if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
532 *flags |= XTENSA_TBFLAG_ICOUNT;
535 if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
536 *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
538 if (cs->singlestep_enabled && env->exception_taken) {
539 *flags |= XTENSA_TBFLAG_EXCEPTION;
541 if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
542 (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
543 uint32_t windowstart = xtensa_replicate_windowstart(env) >>
544 (env->sregs[WINDOW_BASE] + 1);
545 uint32_t w = ctz32(windowstart | 0x8);
547 *flags |= w << XTENSA_TBFLAG_WINDOW_SHIFT;
549 *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
553 #include "exec/cpu-all.h"
554 #include "exec/exec-all.h"